Type-writing machine.



* J. A. RONOHETTI.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 5, 1906.

1,1. 1 6,490. Patented Nov. 10,. 1914.

Fig... 1-

ll (l UNITED STATES PATENT OFFICE.

JOSEPH ALBERT RONCHETTI, OF WOONSOCKET, RHODE ISLAND, ASSIGNOB, BY MESNE ASSIGNMENTS, TO THE NOISELESS TYPEWBITEE COMPANY, OF MIDDLETOWN, CONNECTICUT, .A. CORPORATION OF CONNECTICUT.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Nov. 10, 1914.

Application filed June 5, 1908. Serial No. 436,756.

To all whom it may concern:

Be it known that I, Jossrn A. RoNcnm'rI, a subject of the King of Italy, residing at Woonsocket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to typewriting machines, and more particularly to that class of machines employing vertically shiftable platen carriages.

One of the objects of the invention is to provide improved means for preventing any lost motion between the platen carriage and its support, when said support is moved to shift the platen for different case printing.

Another object of the invention is to provide new and improved means for facilitating the travel of the platen carriage upon its supporting means.

Another object thereof is to so mount the platen carriage upon a vertically shiftable rail upon which the carriage travels that any slack that may occur, from time to time between the relatively movable parts will be automatically taken up.

Other objects will be in part obvious and in art pointed out hereinafter.

he invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction here inafter described and the scope 9f the application of which will be indicated in the ap iended claims.

eferring now to the drawings, wherein are illustrated two of various possible em bodiments of my invention: Figure 1 is a view taken transversely with a portion of the typewriting machine, showing the same Fig. 2 is a vertical sectional view taken substantially on line 2-2 Fig. 1, the parts constituting the invention being shown in elevation. Fig. 3 is a detail view showing a different embodiment of the invention.

Similar reference characters refer to similar parts in the several views of the drawmg.

Referring" now to the drawings, I indicates recession when the platen 4 thereof is en gaged by the printing intrumentalities. The platen 4 in the present instance is constituted by a thin metallic strip which is supported at its ends by the side member of the platen carriage and has its rear face curved to conform to the contour of the platen roll which is shown conventionally at 5.

6 denotes a rail which extends longitudinally of the machine, said rail being carried in the present instance upon uprights 7 which receive the ends of the arms 8 mounted upon a shift shaft 10 which is adapted to be rocked to swing arms 8 by suitable shift mechanism connected with an arm 11, said shifting mechanism not being shown herein.

Platen carriage 3, in the present instance, at either end thereof, is provided with a pair of diverging legs or studs shown at 13 and 14:, and supported in these legs are pivot pins 15, each'of said pins carrying a roller 16, said rollers being held in position upon said pins as by means of screws 17 Rollers 16, in the present instance, have their peripheries inclined toward their axes of rotation, the ends of the rollers having the greater diameter positioned uppermost upon said pins. Rollers 16 rest upon rail 6, which, in the present instance, is of circular contour, and ride thereon when the platen carriage is moved longitudinally on said rail. The platen carriage is con nected with the feed pinion 18 of the escapement shift 20 by means of the usual, carriage rack 21, said carriage rack being, in the present instance, carried upon swinging arms 22 which are pivoted, as at 23, upon arms 24 extending rearward and downward from the platen carriage.

A roller as at 25 is journaled upon a pin 26 threaded into the tie-rod, and forms a upport for rack 21 which is urged to the position shown in the drawing by means of a spring 27 attached to the platen frame and bearing against the arms 22 which carry the rack.

When the platen carriage is shifted upwardly or downwardly from its normal position to change the relative position of thetype and platen the rack 21 remains in constant mesh with the feed pinion 18 on the escapement shaft 20, the arms 22 swinging about their pivotal supports 23. Arms 29 attached to legs 13 and 14 extend beneath rail 6 and prevent the platen carriage from being lifted from rail 6.

In Fig. 3 of the drawings I have shown a slightly different embodiment of my invention in that spherical rollers 28 are mounted upon the legs 13 and 1a of the platen carriage and ride upon a rail 30 which has angularly disposed faces 31 and 32. The platen carriage in this embodiment is retained in position upon said rail by means of spherical rollers 33 supported in extensions 34 of arms 14 which engage with the face' 35 formed upon the under portion of said rail.

It will be understood that in both of the above embodiments ofmy invention the platen carriage during its letter spacing or return movement rides upon the shiftable rail by means of the interposed rollers which are so formed as to take up any slack by gravity which might occur between its parts no to wear of the bearing surfaces. The rail and the associate parts will therefore always be in close running engagement thereby insuring against the production of noise when the rail is lifted or the platen is shifted. The platen carriage is moreover prevented from being lifted from the'rail by means of the members which are extended beneath the same.

As many changes could be made in the above construction and many apparently widely different embodiments .of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. It is also-to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the inventlon herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Having thus described my invention, what I claim as new and desire to secure by Lettors Patent is:

1. In a typewriting machine, the combination with the platen carriage, of a shiftable ran] for supporting the platen carriage, saidplaten carriage having at, either-end thereof a palr of diverging legs, and a roller mounted upon each of said legs and running upon said rail.

2. In a typewriting machine, the combination with the platen carriage, of a-shiftable rail which extends longitudinally of the machine and upon which the platen carriage travels for letter spacing, and a plurality of frustoconical rollers mounted upon said platen carriage and running upon said rail.

3. In a typewriting machine, the combination with the platen carriage, of a vertically shiftable rail upon which the platen carriage travels for letter spacing and a plurality of rollers mounted upon said platen carriage and running upon said rail, said rollers having their peripheries inclined toward their axes of rotation.

4. In a itypewriting machine, the combination with the platen carriage, of a shiftable rail which forms a support for the platen carriage, and. upon which the latter travels when moving for letter spacing, diverging legs depending from the platen carriage, and a roller mounted upon each of said legs and running upon said rail, each of said rollers being formed with its pe-.

riphery disposed upon an incline with respect to its axis of rotation.

5. In a typewriting machine, the combination with the platen carriage, of a vertically shiftable rail upon which the platen carriage is supported and upon which it rides for letter spacing, a plurality of rollers having their axes inclined with respect to one another interposed between said rail and said platen carriage, and rotatively mounted upon the latter and means extending from said platen carriage beneath said rail for preventing the platen carriage from being lifted therefrom.

6. In a typewriting machine, the-combination with the platen carriage of a vertically shiftable rail interposed in the support of the platen carriage upon which the latter-rides during letter spacing, said car riage being provided with a pair of diverging legs at either end thereof, a roller having its periphery inclined toward its axis of rotation mounted upon each of said legs and an arm mountel upon each of said legs,

and extending beneath said rail, whereby said platen carriage is prevented from being lifted therefrom.

In a typewriting machine, the combination with a shiftable paper carrier, of a shift rail therefor, antifriction devices on said carrier adapted to travel along said rail, a feed pinion, a pivotally supported rack on said carrier adapted to mesh with said pinion in all positions, and spring means. for holding said rack and pinion in mesh'when said carrier is shifted.

8, A typewriter carriage mechanism combming a platen carriage comprising an elongated reciprocating frame, an elongated paper roller positioned within said frame and adapted to reciprocate therewith, a stud extending upwardly into attachment with an under side of said frame, a roller mounted to freely rotate about said stud, a second stud also attached at its upper end to an under side of said frame and disposed at an angle with the other stud, a second roller mounted on said second stud, and a horizontally extending rail arranged to be in simultaneous direct contact with the periphcries of both of said rollers with the tangents of contact converging toward a point above the rail, whereby said rollers may both contribute to the support of the carriage.

9. A typewriter carriage mechanism combining a platen carriage comprising an elongated reciprocating frame, an elongated paper roller positioned within said frame and adapted to reciprocate therewith, a stud extending upwardly into attachment with an under side of said frame, a roller mounted to freely rotate about said stud, said roller having a peripheral surface converging downwardly toward the axis of the stud, a second stud also attached at its upper end to an under side of said frame and disposed at an angle with the other stud, a second roller similar to said other roller and mounted on said second stud with its peripheral surface also downwardly converging, and a horizontally extending rail arranged to be in simultaneous contact with the converging peripheries of both of said rollers with the tangents of contact converging toward a point above the rail, whereby said rollers may both contribute to the support of the carriage.

10. A typewriter carriage mechanism combining a platen carriage comprising an elongated reciprocating frame, an elongated paper roller positioned within said frame and adapted to reciprocate therewith, a stud extending upwardly into attachment with an under side of said frame, a roller mounted to freely rotate about said stud, said roller having a peripheral surface converging downwardly toward the axis of the stud, a second stud also attached at its upper end to an under side of said frame and disposed at an angle with the other stud, a second roller similar to said other roller and mounted on said second stud with its peripheral surface also downwardly converging, a horizontally extending rail arranged to be in simultaneous contact with the converging peripheries .of both of said rollers with the tangents of contact converging toward a point above the rail, whereby said rollers may both contribute to the support of the carriage, and means laterally positioned with respect to the axis of said paper roller for preventing the frame from swinging about said rail as an axis.

11. A typewriter carriage mechanism combining a platen carriage and comprising an elongated reciprocating frame, an elongated paper roller positioned within said frame and adapted to reciprocate therewith, a stud extending upwardly into attachment with an under side of said frame, a roller mounted to freely rotate about said stud, said roller having a peripheral surface converging downwardly toward a point in the axis of the stud distant from the roller, a second stud also attached at its upper end to an under side of said frame and disposed at an angle with the other stud, a second roller similar to said other roller and mounted on said second stud with its pe ripheral surface also downwardly converging, a cylindrical horizontally extending rail arranged to be in simultaneous direct contact with the said converging peripheries of both of said rollers with the tangents of contact converging toward a point above the rail, whereby said rollers may both contribute to the support of the carriage, and means secured to the frame underlying said rail in close proximity therewith to prevent an uprising of said frame from said rail.

7 ln testimony whereof I atlix my signature, in the presence of two witnesses.

JOSEPH ALBERT RONCHETTI.

Witnesses:

C. H. WILCOX, H. M. SEAMANS. 

